THE FREEMAN INCANDESCENT LAMP.
A new incandescent lamp is now being exploited by the Warren P. Freeman Electrical Company of 106 and 108 Liberty, street this city, and is the invention of Mr Freeman, from whom the company takes its name.
The illustration which appears on this page will give our readers an excellent idea of the appearance of this lamp, which is certainly original in design, and which has so far as tested given good results. The currrent is carried from the lower extremity of the lamp to the top through a small conductor surrounded by a very thin glass tube on the inner side of the globe. Any filament can be used but Mr. Freeman manufactures one of his own, specially adapted for his lamp. The straight carbon can be put in the lamp at the carbon furnace without special treatment for increasing or decreasing the resistance.
Being straight it can be cut any length desired, and the resistance in any number of lamps thereby made uniform. In putting the lamp up, it makes no difference at what angle it is placed, as the inner tube and conductor supports the carbon at both ends This is claimed as an improved feature, as the ordinary loop carbon at full capacity will have a tendency to droop when placed at an angle. When the Freeman lamp is placed in a building where there is more or less jarring, the vibrations take place below the carbon support, and does not disturb the fillament above. The lamp is therefore claimed to be especially adapted for steamboats and other placts where there is more or less jarring.
The lamp is not expensive, can be constructed, the inventor states, for less than the loop carbon lamps, and can be made any candle power desired up to 300. |
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